Gentex

Pleotint window on left darkened to neutral-gray tint as heat load increased. On the right, the window has returned to clearest state as direct sunlight decreased. Credit: PPG Industries I’ve written several times the past about electrical (e.g., Sage) and passive (e.g., RavenBrick) dynamic (chromic) window systems and how some heavy hitters, such as Saint-Gobain…